//
//class Friend{
//    def listen(){
//        "$name is listening as a friend"
//    }
//}
//
//@Mixin(Friend)
//class Person{
//    String firstName
//    String lastName
//    String getName(){
//        "$firstName $lastName"
//    }
//}
//
//john = new Person(firstName: "John", lastName: "Smith")
//println john.listen()